In message <Pine.NEB.4.58.0401262225120.862@oni.i.purplei.com>, you write: 

-> 	Building pkgsrc on a newly installed 1.6ZI box and it managed to
-> 	get itself into a loop. Unfortunately the loop ended with a panic,
-> 	the first I've seen on a sparc64 box in a long while:
-> 
-> 	Does anyone have any thoughts/suggestions?

No, but I've seen this type of panic with a similar stack trace since
maybe 1.6Q and just recently (within the last couple of weeks) got one
with my 1.6ZE kernel.  The early history of this panic is that I think
a bunch of work Chuq did on the pmap first made it much worse and then
mostly vanquished it... I've seen it maybe 2 or 3 times outside that
window where it seemed to happen mercilessly (which was sometime in
the 1.6Q - 1.6T timeframe).

Unfortunately, since this panic tends to happen while in the FS code,
it's always refused to dump core for me with a subsequent "locking
against myself" panic.  Since my U5 is my main shell/mail/file server
I've tended to just let it reboot when this has happened.

--rafal

----
Rafal Boni                                                     rafal@pobox.com
  We are all worms.  But I do believe I am a glowworm.  -- Winston Churchill